Uneven Roof Trusses

Roof trusses may be crucial for a garage s integrity and stability.

Uneven roof trusses.

I drew in a truss on the left going from the roof edge to over the bearing interior wall. Now i can see the wall in roof mode and i know where to make the break in the truss. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi. The roof trusses for sheds are one of the most vital pieces to design.

From time to time an attic rafter will split along a knot typically after having a new roof installed because of the workers walking around on it. Obviously this is not a good situation as it can cause the entire roof to fail if not addressed. The bottom image illustrates proper horizontal storage with blocking placed at a suffficient height beneath the stack of trusses to minimize lateral bending and to lessen moisture gain from the ground. Repairing this is called scabbing.

These consist of 2 rafters that will hold up the structure s roof. Also different architectural styles will use the same type of roof. If needed shim trusses or rafters to level the nailing surface and install blocking to straighten any warped or bowed top chords of trusses or rafters. Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss.

Then i drew another truss starting at the end of the first truss and going to the edge of the roof on the right. If one support is as little as 1 4 inch lower or higher than the one next to it you might end up with an uneven roof. Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber. They are designed at a 4 12 pitch to be spaced 2 foot on center.

The top photo above shows trusses being improperly stored on uneven ground.